I believe in enjoying my stuff and not just keeping it on a shelf, so these cups have been in use as drinking glasses in my kitchen for a few years. They are McKee glass and they are a very pretty milky green. They are heavy in your hand. Quality made glass - so vintage, so pretty. My 11 year old and 7 year old have used them regularly and they haven't got a nick or crack among them. If you look closely you can see variations in the color which look like fine lines. See below.
Alas, all of these items are currently up for sale on Ebay. I've decided to part with them all. Hopefully some collector (either Martha or Alexis) will snatch them up. One can hope. It is tough to part with them as I really love them, but hopefully they will find their way to a good home.
I only have one other piece of Jadeite that I am keeping. A McKee jadite serving bowl. That will stay with me for now.
Keep your eyes out for great finds at the thrift store. They are rare, but when you do find one it will be a great score!